(19)

(11)

EP 0 601 143 A1

(12)

(43) Date of publication: 15.06.1994 Bulletin 1994/24 (21) Application number: 93910209.0 (22) Date of filing: 17.05.1993

(51) International Patent Classification (IPC):  G01T 1/ 04( . ) G01T 1/ 204( . ) G01T 1/ 167( . ) (86) International application number: PCT/GB1993/001001 (87) International publication number: WO 1993/023770 (25.11.1993 Gazette 1993/28)

(84) Designated Contracting States: BE DE ES FR GB NL (30) Priority: 15.05.1992 GB 19920010455 (71) Applicant: British Nuclear Fuels PLC Risley Warrington Cheshire, WA3 6AS (GB)	(72) Inventor: HOLMES, Robert, George, Godfrey 18 Carr Drive Lancs PR4 3DS (GB) (74) Representative: McCormack, Derek James  British Nuclear Fuels plc, Patents Section, Legal Department Risley, Warrington, Cheshire WA3 6AS Risley, Warrington, Cheshire WA3 6AS (GB)